JP2021093331A - Battery stack and battery module using the battery stack - Google Patents

Battery stack and battery module using the battery stack Download PDF

Info

Publication number
JP2021093331A
JP2021093331A JP2019224461A JP2019224461A JP2021093331A JP 2021093331 A JP2021093331 A JP 2021093331A JP 2019224461 A JP2019224461 A JP 2019224461A JP 2019224461 A JP2019224461 A JP 2019224461A JP 2021093331 A JP2021093331 A JP 2021093331A
Authority
JP
Japan
Prior art keywords
battery
battery cell
side wall
longitudinal direction
wall portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2019224461A
Other languages
Japanese (ja)
Other versions
JP7351204B2 (en
Inventor
柳内　昭宏
Akihiro Yanagiuchi
昭宏 柳内
真浩 坂田
Masahiro Sakata
真浩 坂田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2019224461A priority Critical patent/JP7351204B2/en
Priority to US17/085,455 priority patent/US20210184189A1/en
Priority to CN202011266200.3A priority patent/CN112993456B/en
Publication of JP2021093331A publication Critical patent/JP2021093331A/en
Application granted granted Critical
Publication of JP7351204B2 publication Critical patent/JP7351204B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

To obtain a battery stack and a battery module, capable of improving radiation performance of a plurality of battery cells on which water proof measures are taken, with simple structures.SOLUTION: A battery stack 12 has an opening 40 on a resin frame 18 provided between battery cells 16 arranged so as to be adjacent to each other. The opening 40 is formed between tips of a support part 26 and a support part 28 that are formed by being bent from bottom edges of side wall parts 22, 24 of the resin frame 18 in directions in which the support parts become closer to each other. Thereby, at an undersurface 38 of a battery cell 16, a region other than both end parts 30, 34 of the battery cell 16 is exposed through the opening 40. Because a plurality of battery cells 16 are arranged along the longer direction of the battery stack 12, a large opening 41 is formed by continuous openings 40. Cooling the battery cells 16 through the large opening 41 makes it possible to improve radiation performance of the battery cells 16 with a simple structure.SELECTED DRAWING: Figure 2

Description

本発明は、電池スタック及びこの電池スタックを用いた電池モジュールに関する。 The present invention relates to a battery stack and a battery module using this battery stack.

下記特許文献１に記載された電池モジュールでは、電池スタックの一部を構成し電池セルを収容する下面ケースが設けられている。この下面ケースは、電池セルを個々に収容可能とされており、当該電池セルの外面を覆っている。また、下面ケースには、電池セルを露出させる露出部が部分的に形成されており、当該露出部を通じて、電池セルに対して外部冷却器又は冷媒を接触させ、電池セルの冷却を可能としている。 In the battery module described in Patent Document 1 below, a lower surface case is provided which forms a part of the battery stack and houses the battery cells. The lower surface case is designed to accommodate individual battery cells and covers the outer surface of the battery cells. Further, the lower surface case is partially formed with an exposed portion for exposing the battery cell, and the external cooler or the refrigerant is brought into contact with the battery cell through the exposed portion to allow the battery cell to be cooled. ..

特開２０１７−２０１５８７号公報JP-A-2017-201587

しかしながら、上記先行技術では、電池セルの冷却させるため、外部冷却器又は冷媒を必要とするため、電池スタックが複雑化してしまう。このため、電池スタックの放熱対策については、更なる改善の余地がある。 However, in the above prior art, an external cooler or a refrigerant is required to cool the battery cell, which complicates the battery stack. Therefore, there is room for further improvement in heat dissipation measures for the battery stack.

本発明は上記事実を考慮し、防水対策が施された複数の電池セルに対して単純な構造で放熱性能を向上させることが可能な電池スタック及びこの電池スタックを用いた電池モジュールを得ることを目的とする。 In consideration of the above facts, the present invention obtains a battery stack capable of improving heat dissipation performance with a simple structure for a plurality of battery cells provided with waterproof measures, and a battery module using this battery stack. The purpose.

請求項１に記載の発明に係る電池スタックは、防水対策が施され、水平方向に沿って配列され、配列方向に対して直交する方向を長手方向とする複数の電池セルと、隣り合って配置された前記電池セル間にそれぞれ設けられると共に、当該電池セルの長手方向の両端部を支持して、前記電池セルの下面を露出させる開口を形成する複数の樹脂枠と、を含んで構成されている。 The battery stack according to the invention according to claim 1 is provided with waterproof measures, is arranged along the horizontal direction, and is arranged next to a plurality of battery cells whose longitudinal direction is orthogonal to the arrangement direction. A plurality of resin frames are provided between the battery cells, and a plurality of resin frames that support both ends of the battery cells in the longitudinal direction and form an opening that exposes the lower surface of the battery cells are included. There is.

請求項１に記載の発明に係る電池スタックでは、複数の電池セルと、複数の樹脂枠と、を含んで構成されている。電池セルは、防水対策が施されており、水平方向に沿って配列され、配列方向に対して直交する方向を長手方向としている。 The battery stack according to the invention according to claim 1 includes a plurality of battery cells and a plurality of resin frames. The battery cells are waterproofed, arranged along the horizontal direction, and the direction orthogonal to the arrangement direction is the longitudinal direction.

一方、樹脂枠は、隣り合って配置された電池セル間にそれぞれ設けられると共に、電池セルの長手方向の両端部を支持して、電池セルの下面を露出させる開口を形成している。 On the other hand, the resin frames are provided between the battery cells arranged adjacent to each other, and support both ends of the battery cells in the longitudinal direction to form an opening for exposing the lower surface of the battery cells.

すなわち、樹脂枠は、例えば、当該樹脂枠の下壁部が、電池セルの長手方向の両端部を支持する一対の支持部で構成されており、支持部と支持部の間が開口とされる。このため、電池セルの下面では、当該開口を通じて、電池セルの長手方向の両端部以外の領域が露出することとなる。 That is, in the resin frame, for example, the lower wall portion of the resin frame is composed of a pair of support portions that support both ends in the longitudinal direction of the battery cell, and an opening is provided between the support portions. .. Therefore, on the lower surface of the battery cell, regions other than both ends in the longitudinal direction of the battery cell are exposed through the opening.

以上のことから、本発明では、防水対策が施された電池セルに対して、樹脂枠に形成された開口を通じて当該電池セルの下面側から電池セルを冷却することができる。これにより、防水対策を施すと共に単純な構造で放熱性能を向上させる電池スタックを得ることが可能となる。 From the above, in the present invention, the battery cell can be cooled from the lower surface side of the battery cell provided with waterproof measures through the opening formed in the resin frame. This makes it possible to obtain a battery stack that provides waterproof measures and improves heat dissipation performance with a simple structure.

請求項２に記載の発明に係る電池スタックは、請求項１に記載の発明に係る電池スタックにおいて、前記樹脂枠は、隣り合って配置された前記電池セル間に配置される矩形板状の本体部と、前記本体部の長手方向の両端に設けられ、前記電池セルの長手方向の両端が当接可能な一対の側壁部と、前記側壁部の下端から水平方向に沿って屈曲され、前記電池セルの長手方向の両端部の下面に当接して当該電池セルを支持可能な一対の支持部と、を含んで構成されている。 The battery stack according to the invention according to claim 2 is the battery stack according to the invention according to claim 1, wherein the resin frame is a rectangular plate-shaped main body arranged between the battery cells arranged adjacent to each other. A pair of side wall portions provided at both ends of the main body portion in the longitudinal direction and capable of contacting both ends in the longitudinal direction of the battery cell, and a pair of side wall portions bent along the horizontal direction from the lower end of the side wall portion to form the battery. It is configured to include a pair of support portions capable of supporting the battery cell by abutting the lower surfaces of both end portions in the longitudinal direction of the cell.

請求項２に記載の発明に係る電池スタックでは、樹脂枠は、本体部と、一対の側壁部と、一対の支持部と、を含んで構成されている。本体部は、矩形板状を成しており、隣り合って配置された電池セル間に配置される。一対の側壁部は、本体部の長手方向の両端に設けられており、電池セルの長手方向の両端が当接可能とされている。 In the battery stack according to the invention of claim 2, the resin frame includes a main body portion, a pair of side wall portions, and a pair of support portions. The main body has a rectangular plate shape, and is arranged between battery cells arranged adjacent to each other. The pair of side wall portions are provided at both ends in the longitudinal direction of the main body portion, and both ends in the longitudinal direction of the battery cell can be brought into contact with each other.

また、一対の支持部は、側壁部の下端から水平方向に沿って屈曲されており、電池セルの長手方向の両端部の下面に当接して当該電池セルを支持可能としている。すなわち、樹脂枠において、支持部の先端と支持部の先端との間が開口とされ、当該開口を通じて、電池セルの下面が露出することとなる。 Further, the pair of support portions are bent along the horizontal direction from the lower end of the side wall portion, and abut on the lower surfaces of both end portions in the longitudinal direction of the battery cell to support the battery cell. That is, in the resin frame, an opening is formed between the tip of the support portion and the tip of the support portion, and the lower surface of the battery cell is exposed through the opening.

請求項３に記載の発明に係る電池スタックは、請求項２に記載の発明に係る電池スタックにおいて、前記一対の側壁部のうち一方の側壁部に設けられ、前記電池セルを当該一対の側壁部のうち他方の側壁部側へ向かって付勢する付勢部が形成された反基準面と、前記他方の側壁部に設けられ、前記電池セルの長手方向の一端部が当接する基準面と、を備え、前記一対の支持部のうち前記一方の側壁部側に形成された一方の支持部の長さは、前記他方の側壁部側に形成された他方の支持部の長さよりも長くなるように設定されている。 The battery stack according to the invention according to claim 3 is provided on one side wall portion of the pair of side wall portions in the battery stack according to the invention according to claim 2, and the battery cell is attached to the pair of side wall portions. Of the anti-reference surface formed with an urging portion urging toward the other side wall portion side, and a reference surface provided on the other side wall portion and in contact with one end portion in the longitudinal direction of the battery cell. The length of one support portion formed on the one side wall portion side of the pair of support portions is longer than the length of the other support portion formed on the other side wall portion side. Is set to.

請求項３に記載の発明に係る電池スタックでは、樹脂枠において、一対の側壁部のうち一方の側壁部には付勢部が形成されており、付勢部によって、当該電池セルを一対の側壁部のうち他方の側壁部側へ向かって付勢している。 In the battery stack according to the third aspect of the present invention, in the resin frame, an urging portion is formed on one side wall portion of the pair of side wall portions, and the urging portion causes the battery cell to be subjected to the pair of side walls. It is urged toward the side wall of the other side of the part.

当該他方の側壁部には、電池セルの長手方向の一端部が当接する基準面が設けられており、一方の側壁部側は反基準面とされている。さらに、一方の側壁部側に形成された一方の支持部の長さは、他方の側壁部側に形成された他方の支持部の長さよりも長くなるように設定されている。 The other side wall is provided with a reference surface to which one end of the battery cell in the longitudinal direction abuts, and one side wall is a non-reference surface. Further, the length of one support portion formed on one side wall portion side is set to be longer than the length of the other support portion formed on the other side wall portion side.

前述のように、樹脂枠は、一対の支持部によって電池セルの長手方向の両端部をそれぞれ支持している。このため、支持部において、電池セルとの掛かり代を増やすことによって、電池セルを支持する支持力は向上する。その一方で、支持部において、電池セルとの掛かり代を増やすと、電池セルの下面を露出させる開口の面積は小さくなり、電池セルの冷却性能は低下する可能性がある。 As described above, the resin frame supports both ends of the battery cell in the longitudinal direction by a pair of support portions. Therefore, the bearing capacity for supporting the battery cell is improved by increasing the hooking allowance with the battery cell in the support portion. On the other hand, if the hooking allowance with the battery cell is increased in the support portion, the area of the opening that exposes the lower surface of the battery cell becomes smaller, and the cooling performance of the battery cell may deteriorate.

したがって、本発明では、まず、樹脂枠の一方の側壁部に付勢部を設け、電池セルを他方の側壁部側へ付勢して、当該電池セルの長手方向の一端部を他方の側壁部の基準面に当接させている。これにより、一対の支持部において、一方の支持部（反基準面側）側の掛かり代は、他方の支持部（基準面側）側よりも小さくなる。 Therefore, in the present invention, first, an urging portion is provided on one side wall portion of the resin frame, the battery cell is urged toward the other side wall portion side, and one end portion in the longitudinal direction of the battery cell is the other side wall portion. It is in contact with the reference surface of. As a result, in the pair of support portions, the hooking allowance on one support portion (anti-reference surface side) side is smaller than that on the other support portion (reference surface side) side.

このように、樹脂枠の支持部と電池セルとの間で掛かり代が小さい場合、電池セルに対して、支持部による支持力が十分ではなく、電池セルが当該支持部からずれる可能性がある。したがって、電池セルの下面の精度は悪くなる。 In this way, when the hooking allowance between the support portion of the resin frame and the battery cell is small, the support force of the support portion is not sufficient for the battery cell, and the battery cell may be displaced from the support portion. .. Therefore, the accuracy of the lower surface of the battery cell deteriorates.

このため、本発明では、反基準面側となる一方の支持部の長さが、基準面側となる他方の支持部の長さよりも長くなるように設定している。これにより、本発明では、電池セルとの間で掛かり代が小さくなる一方の支持部側において、掛かり代を確保することが可能となる。すなわち、本発明では、電池セルとの間で掛かり代が小さくなる一方の支持部側において支持力が担保され、電池セルの下面の精度を向上させることが可能となる。 Therefore, in the present invention, the length of one support portion on the anti-reference surface side is set to be longer than the length of the other support portion on the reference surface side. Thereby, in the present invention, it is possible to secure the hooking allowance on the support portion side on which the hooking allowance becomes smaller with the battery cell. That is, in the present invention, the bearing capacity is secured on the support portion side where the hooking allowance with the battery cell is reduced, and the accuracy of the lower surface of the battery cell can be improved.

また、電池セルとの掛かり代を確保するために一方の支持部のみ長さを長くすることで、支持部の先端と支持部の先端との離間距離が狭くなることを抑制し、樹脂枠の開口面積を維持することが可能となる。したがって、本発明では、樹脂枠において、電池セルとの掛かり代を確保すると共に、樹脂枠の開口面積を維持して電池セルの下面の露出面積を確保し、電池セルの冷却効率の低下を抑制することが可能となる。 Further, by increasing the length of only one support portion in order to secure the hooking allowance with the battery cell, it is possible to prevent the distance between the tip of the support portion and the tip of the support portion from becoming narrow, and to prevent the resin frame from becoming narrow. It is possible to maintain the opening area. Therefore, in the present invention, in the resin frame, the hooking allowance with the battery cell is secured, the opening area of the resin frame is maintained, the exposed area of the lower surface of the battery cell is secured, and the decrease in the cooling efficiency of the battery cell is suppressed. It becomes possible to do.

請求項４に記載の発明に係る電池モジュールは、請求項１〜請求項３の何れか１項に記載の電池スタックと、防水対策が施された状態で前記電池スタックが収容されると共に、前記電池セルの下面を通じて当該電池セルから発する熱を放熱するヒートシンクが設けられた収容ケースと、を備えている。 The battery module according to the invention according to claim 4 includes the battery stack according to any one of claims 1 to 3 and the battery stack in a state where waterproof measures are taken, and also includes the battery stack. It includes a storage case provided with a heat sink that dissipates heat generated from the battery cell through the lower surface of the battery cell.

請求項４に記載の発明に係る電池モジュールでは、電池スタックと収容ケースが備わっており、収容ケースには、防水対策が施された状態で電池スタックが収容されるようになっている。さらに、収容ケースにはヒートシンクが設けられており、電池セルの下面を通じて当該電池セルから発する熱を放熱するようになっている。 The battery module according to the invention according to claim 4 is provided with a battery stack and a storage case, and the battery stack is housed in the storage case in a state of being waterproofed. Further, the accommodating case is provided with a heat sink so that heat generated from the battery cell is dissipated through the lower surface of the battery cell.

以上説明したように、請求項１に記載の電池スタックは、防水対策が施された複数の電池セルに対して単純な構造で放熱性能を向上させることができる、という優れた効果を有する。 As described above, the battery stack according to claim 1 has an excellent effect that heat dissipation performance can be improved with a simple structure for a plurality of battery cells provided with waterproof measures.

請求項２に記載の電池スタックは、電池スタックを支持する樹脂枠に開口を設け、当該開口を通じて、電池セルを放熱させることができる、という優れた効果を有する。 The battery stack according to claim 2 has an excellent effect that an opening is provided in the resin frame supporting the battery stack and the battery cell can be dissipated through the opening.

請求項３に記載の電池スタックは、樹脂枠において、電池スタックの支持力を確保すると共に、電池セルの冷却効率の低下を抑制することができる、という優れた効果を有する。 The battery stack according to claim 3 has an excellent effect that the bearing capacity of the battery stack can be secured and the decrease in the cooling efficiency of the battery cells can be suppressed in the resin frame.

請求項４に記載の電池モジュールは、防水対策が施された複数の電池セルに対して単純な構造で放熱性能を向上させることができる、という優れた効果を有する。 The battery module according to claim 4 has an excellent effect that heat dissipation performance can be improved with a simple structure for a plurality of battery cells provided with waterproof measures.

本発明の実施形態に係る電池モジュールの一部を構成する電池スタック及び収容ケースを示す断面図である。It is sectional drawing which shows the battery stack which constitutes a part of the battery module which concerns on embodiment of this invention, and the accommodating case. 本発明の実施形態に係る電池モジュールの一部を構成する電池スタックを斜め下方側から見た斜視図である。It is a perspective view which looked at the battery stack which constitutes a part of the battery module which concerns on embodiment of this invention from the diagonally lower side. 本発明の実施形態に係る電池モジュールの一部を構成する電池スタック及び収容ケースを示す斜視図である。It is a perspective view which shows the battery stack which constitutes a part of the battery module which concerns on embodiment of this invention, and the accommodating case. 本発明の実施形態に係る電池モジュールの一部を構成する電池スタックが収容ケースに収容された状態を示す斜視図である。It is a perspective view which shows the state in which the battery stack which constitutes a part of the battery module which concerns on embodiment of this invention is housed in a storage case. 本発明の実施形態に係る電池スタックの一部を構成する電池セル及び樹脂枠の斜視図である。It is a perspective view of the battery cell and the resin frame which form a part of the battery stack which concerns on embodiment of this invention. 本発明の実施形態に係る電池スタックの一部を構成する電池セルと収容ケースの底壁部との高さ方向の位置関係を示す要部拡大断面図である。FIG. 5 is an enlarged cross-sectional view of a main part showing a positional relationship in the height direction between a battery cell forming a part of the battery stack according to the embodiment of the present invention and a bottom wall portion of a storage case. 本発明の実施形態に係る電池スタックの一部を構成する電池セルの反基準面側及び基準面側において、収容ケースの底壁部の底壁面からの距離を比較したグラフである。It is a graph comparing the distance from the bottom wall surface of the bottom wall portion of the storage case on the anti-reference surface side and the reference surface side of the battery cell forming a part of the battery stack according to the embodiment of the present invention. （Ａ）、（Ｂ）は、（Ｃ）の比較例であり、（Ｃ）は、本発明の実施形態に係る電池スタックの一部を構成する電池セルと樹脂枠について模式的に示す側面図である。(A) and (B) are comparative examples of (C), and (C) is a side view schematically showing a battery cell and a resin frame constituting a part of the battery stack according to the embodiment of the present invention. Is.

本発明の実施形態に係る電池スタック１２について、図面を用いて説明する。
なお、各図中に適宜示される矢印ＵＰ、矢印Ｌ、矢印Ｗは、本実施形態に係る電池モジュール１０の上方向、長手方向、幅方向をそれぞれ示している。 The battery stack 12 according to the embodiment of the present invention will be described with reference to the drawings.
The arrows UP, L, and W appropriately shown in the drawings indicate the upward direction, the longitudinal direction, and the width direction of the battery module 10 according to the present embodiment, respectively.

（電池モジュールの構成）
まず、本発明の実施形態に係る電池モジュール１０の構成について説明する。 (Battery module configuration)
First, the configuration of the battery module 10 according to the embodiment of the present invention will be described.

本実施形態では、図３に示されるように、電池モジュール１０は、電池スタック１２と収容ケース１４を備えており、図４に示されるように、電池スタック１２は収容ケース１４内に収容されるようになっている。 In the present embodiment, as shown in FIG. 3, the battery module 10 includes a battery stack 12 and a storage case 14, and as shown in FIG. 4, the battery stack 12 is housed in the storage case 14. It has become like.

図３、図５に示されるように、電池スタック１２は、複数の電池セル１６及び複数の樹脂枠１８を含んで構成されている。電池セル１６は、扁平な直方体形状を成しており、電池セル１６は、当該電池セル１６の長手方向に対して直交する幅方向に沿って複数配列され、複数の電池セル１６が水平方向に沿って配置されている。なお、電池セル１６には、防水対策が施されている。 As shown in FIGS. 3 and 5, the battery stack 12 includes a plurality of battery cells 16 and a plurality of resin frames 18. The battery cells 16 have a flat rectangular parallelepiped shape, and a plurality of battery cells 16 are arranged along a width direction orthogonal to the longitudinal direction of the battery cells 16, and the plurality of battery cells 16 are arranged in the horizontal direction. It is arranged along. The battery cell 16 is provided with waterproof measures.

各電池セル１６は、例えば、充放電可能な二次電池、例えば、リチウムイオン二次電池であり、扁平な直方体形状の角型電池とされているが、リチウムイオン二次電池に限らず、ニッケル水素二次電池等の他の種類であってもよい。 Each battery cell 16 is, for example, a rechargeable secondary battery, for example, a lithium ion secondary battery, which is a square battery having a flat rectangular shape, but is not limited to the lithium ion secondary battery and is made of nickel. It may be another type such as a hydrogen secondary battery.

また、各電池セル１６の上面１６Ａには、円柱状の正極端子１６Ｂ及び負極端子１６Ｃが設けられている。正極端子１６Ｂと負極端子１６Ｃは、電池スタック１２の長手方向（電池セル１６の配列方向；矢印Ｌ方向）に沿って向きを変えて交互に配置されるように電池セル１６は配列されている。そして、電池スタック１２の長手方向に沿って隣り合う電池セル１６の正極端子１６Ｂ及び負極端子１６Ｃは、導電性部材である図示しないバスバーを介して互いに接続されている。 Further, a columnar positive electrode terminal 16B and a negative electrode terminal 16C are provided on the upper surface 16A of each battery cell 16. The battery cells 16 are arranged so that the positive electrode terminals 16B and the negative electrode terminals 16C are alternately arranged along the longitudinal direction of the battery stack 12 (the arrangement direction of the battery cells 16; the arrow L direction). The positive electrode terminals 16B and the negative electrode terminals 16C of the battery cells 16 adjacent to each other along the longitudinal direction of the battery stack 12 are connected to each other via a bus bar (not shown) which is a conductive member.

また、隣り合って配置された電池セル１６間には、樹脂枠１８が配置されている。つまり、電池スタック１２は、電池セル１６と樹脂枠１８とが交互に配列された構成になっている。樹脂枠１８は、例えば、ポリプロピレン等の樹脂によって形成されており、電池セル１６と電池セル１６の間に絶縁部材として配置されている。 Further, a resin frame 18 is arranged between the battery cells 16 arranged adjacent to each other. That is, the battery stack 12 has a configuration in which the battery cells 16 and the resin frame 18 are alternately arranged. The resin frame 18 is formed of, for example, a resin such as polypropylene, and is arranged as an insulating member between the battery cells 16 and the battery cells 16.

そして、電池セル１６と樹脂枠１８とが交互に配列された状態で、電池セル１６及び樹脂枠１８は、電池セル１６の長手方向の両端部かつ上下において、加圧バンド１９によって電池セル１６の配列方向に沿って加圧されている。これにより、電池スタック１２において、電解質の材料粒子間のイオン伝導性は保持され、電池性能は維持されるようになっている。 Then, in a state where the battery cells 16 and the resin frame 18 are alternately arranged, the battery cells 16 and the resin frame 18 are formed of the battery cells 16 by the pressure bands 19 at both ends and above and below in the longitudinal direction of the battery cells 16. It is pressurized along the arrangement direction. As a result, in the battery stack 12, the ionic conductivity between the material particles of the electrolyte is maintained, and the battery performance is maintained.

図５に示されるように、樹脂枠１８は、本体部２０と、一対の側壁部２２、２４と、一対の支持部２６、２８と、を含んで構成されている。本体部２０は、矩形板状を成しており、隣り合って配置された電池セル１６間に配置される。本体部２０の長手方向の両端には、側壁部２２、２４がそれぞれ設けられており、側壁部２２、２４は、本体部２０の側端から張り出している。 As shown in FIG. 5, the resin frame 18 includes a main body portion 20, a pair of side wall portions 22, 24, and a pair of support portions 26, 28. The main body 20 has a rectangular plate shape, and is arranged between the battery cells 16 arranged adjacent to each other. Side wall portions 22 and 24 are provided at both ends of the main body portion 20 in the longitudinal direction, respectively, and the side wall portions 22 and 24 project from the side ends of the main body portion 20.

このため、電池セル１６に樹脂枠１８の本体部２０が隣接された状態で、樹脂枠１８において、一方の側壁部２２には電池セル１６の長手方向の一端部３０に設けられた側壁面３２が当接可能とされ、他方の側壁部２４には電池セル１６の長手方向の他端部３４に設けられた側壁面３６が当接可能とされる。 Therefore, in the state where the main body portion 20 of the resin frame 18 is adjacent to the battery cell 16, the side wall surface 32 provided on one side wall portion 22 of the resin frame 18 at one end portion 30 in the longitudinal direction of the battery cell 16. Is contactable, and the side wall surface 36 provided at the other end 34 in the longitudinal direction of the battery cell 16 is contactable with the other side wall 24.

また、樹脂枠１８において、側壁部２２、２４の下端からは、本体部２０と連設され互いに近づく方向へ向かって屈曲する支持部２６、２８がそれぞれ延出されている。当該支持部２６、２８には、電池セル１６の下面３８が当接し、支持部２６、２８によって電池セル１６の長手方向の両端部３０、３４がそれぞれ支持されるようになっている。 Further, in the resin frame 18, support portions 26 and 28, which are connected to the main body portion 20 and bend in a direction approaching each other, extend from the lower ends of the side wall portions 22 and 24, respectively. The lower surface 38 of the battery cell 16 is in contact with the support portions 26 and 28, and both end portions 30 and 34 of the battery cell 16 in the longitudinal direction are supported by the support portions 26 and 28, respectively.

つまり、本実施形態では、一方の支持部２６の先端２６Ａと他方の支持部２８の先端２８Ａとの間には開口４０が形成されている。この開口４０を通じて、電池セル１６の下面３８が露出可能とされる。 That is, in the present embodiment, an opening 40 is formed between the tip 26A of one support portion 26 and the tip 28A of the other support portion 28. The lower surface 38 of the battery cell 16 can be exposed through the opening 40.

そして、図２に示されるように、当該開口４０は、電池セル１６の配列方向に沿って連続して形成される。したがって、電池スタック１２の下部１２Ａには、当該開口４０が連続して形成された大開口部４１が形成されることとなる。 Then, as shown in FIG. 2, the openings 40 are continuously formed along the arrangement direction of the battery cells 16. Therefore, in the lower portion 12A of the battery stack 12, a large opening 41 in which the opening 40 is continuously formed is formed.

また、図５に示されるように、樹脂枠１８の側壁部２２には、側壁部２４と対向してリップ部（付勢部）４２が設けられている。リップ部４２は、電池セル１６が樹脂枠１８に支持された状態で、電池セル１６を側壁部２４側へ向かって付勢している。 Further, as shown in FIG. 5, the side wall portion 22 of the resin frame 18 is provided with a lip portion (biased portion) 42 facing the side wall portion 24. The lip portion 42 urges the battery cell 16 toward the side wall portion 24 while the battery cell 16 is supported by the resin frame 18.

これにより、電池セル１６の側壁面３６が樹脂枠１８の側壁部２４に当接している。このように、樹脂枠１８の側壁部２４において、電池セル１６の側壁面３６が当接する面は基準面４４と称され、樹脂枠１８の側壁部２２側は、反基準面４６と称される。 As a result, the side wall surface 36 of the battery cell 16 is in contact with the side wall portion 24 of the resin frame 18. As described above, in the side wall portion 24 of the resin frame 18, the surface with which the side wall surface 36 of the battery cell 16 abuts is referred to as the reference surface 44, and the side wall portion 22 side of the resin frame 18 is referred to as the anti-reference surface 46. ..

一方、図３には、電池モジュール１０の一部を構成する電池スタック１２及び収容ケース１４を示す斜視図が示されている。図３に示されるように、収容ケース１４は上方側が開口された箱状を成している。収容ケース１４はアルミニウム等のダイカストで形成されており、図４に示されるように、当該収容ケース１４の収容部１５内に電池スタック１２が収容されている。 On the other hand, FIG. 3 shows a perspective view showing a battery stack 12 and a storage case 14 that form a part of the battery module 10. As shown in FIG. 3, the storage case 14 has a box shape with an opening on the upper side. The storage case 14 is formed of die-cast aluminum or the like, and as shown in FIG. 4, the battery stack 12 is housed in the storage portion 15 of the storage case 14.

このように、電池スタック１２が収容ケース１４内に収容された状態で、収容ケース１４には、図１に示されるように、カバー４８が固定される。なお、図１には、電池モジュール１０の断面図で示されている。 In this way, with the battery stack 12 housed in the storage case 14, the cover 48 is fixed to the storage case 14 as shown in FIG. Note that FIG. 1 is a cross-sectional view of the battery module 10.

図１に示されるように、カバー４８と収容ケース１４との間には、図示しない封止部材が設けられており、電池スタック１２は、封止された状態で収容ケース１４内に収容されている。そして、電池スタック１２が収容ケース１４内に収容された状態で、収容ケース１４の底壁部１４Ａには、電池スタック１２が載置されている。 As shown in FIG. 1, a sealing member (not shown) is provided between the cover 48 and the storage case 14, and the battery stack 12 is housed in the storage case 14 in a sealed state. There is. Then, with the battery stack 12 housed in the storage case 14, the battery stack 12 is placed on the bottom wall portion 14A of the storage case 14.

ここで、図７には、電池セル１６の長手方向の一端部３０側（反基準面４６側）と電池セル１６の長手方向の他端部３４側（基準面４４側）において、収容ケース１４の底壁部１４Ａの底壁面１４Ａ１からの距離を比較したグラフが示されている。 Here, in FIG. 7, the storage case 14 is shown at one end 30 side (anti-reference surface 46 side) of the battery cell 16 in the longitudinal direction and the other end 34 side (reference surface 44 side) of the battery cell 16 in the longitudinal direction. A graph comparing the distances of the bottom wall portion 14A from the bottom wall surface 14A1 is shown.

図７に示されるように、図１に示す電池セル１６の反基準面４６側は、電池セル１６の基準面４４側よりも収容ケース１４の底壁部１４Ａの底壁面１４Ａ１からの距離が短くなっている。つまり、電池セル１６の反基準面４６側は、電池セル１６の基準面４４側よりも下方側に垂れている。 As shown in FIG. 7, the distance from the bottom wall surface 14A1 of the bottom wall portion 14A of the housing case 14 is shorter on the anti-reference surface 46 side of the battery cell 16 shown in FIG. 1 than on the reference surface 44 side of the battery cell 16. It has become. That is, the anti-reference surface 46 side of the battery cell 16 hangs downward from the reference surface 44 side of the battery cell 16.

このため、本実施形態では、図５に示されるように、支持部２６の長さＬ１は、支持部２８の長さＬ２（＜Ｌ１）よりも長くなるように設定され、電池セル１６の長手方向の一端部３０が支持部２６によって確実に支持されるように設定されている。 Therefore, in the present embodiment, as shown in FIG. 5, the length L1 of the support portion 26 is set to be longer than the length L2 (<L1) of the support portion 28, and the length of the battery cell 16 is long. One end portion 30 in the direction is set so as to be reliably supported by the support portion 26.

また、本実施形態では、図１に示されるように、収容ケース１４の底壁部１４Ａには、放熱グリス５０が塗布されている。このため、電池スタック１２は、放熱グリス５０を介して、収容ケース１４の底壁部１４Ａに載置されることとなる。 Further, in the present embodiment, as shown in FIG. 1, thermal paste 50 is applied to the bottom wall portion 14A of the storage case 14. Therefore, the battery stack 12 is placed on the bottom wall portion 14A of the storage case 14 via the thermal paste 50.

前述のように、電池セル１６は、樹脂枠１８の支持部２６、２８に支持されており、支持部２６の上面２６Ｂ及び支持部２８の上面２８Ｂに、電池セル１６の下面３８が接触した状態となっている。 As described above, the battery cell 16 is supported by the support portions 26 and 28 of the resin frame 18, and the lower surface 38 of the battery cell 16 is in contact with the upper surface 26B of the support portion 26 and the upper surface 28B of the support portion 28. It has become.

このため、厳密にいうと、電池セル１６の下面３８と支持部２６の下面２６Ｃ、電池セル１６の下面３８と支持部２８の下面２８Ｃとの間には、それぞれ高低差が生じる。したがって、本実施形態では、放熱グリス５０は、これらの高低差を吸収する塗布厚となるように予め設定されている。 Therefore, strictly speaking, there is a height difference between the lower surface 38 of the battery cell 16 and the lower surface 26C of the support portion 26, and the lower surface 38 of the battery cell 16 and the lower surface 28C of the support portion 28, respectively. Therefore, in the present embodiment, the thermal paste 50 is preset to have a coating thickness that absorbs these height differences.

一方、図６には、電池セル１６と収容ケース１４の底壁部１４Ａとの高さ方向の位置関係を示す要部拡大断面図が示されている。図６に示されるように、複数の電池セル１６が配列した状態で、電池セル１６の長手方向の一端から当該電池セル１６を見た場合、電池セル１６の下面３８の高さ方向の位置には、数μm〜１０数μmのばらつきが生じる。このため、放熱グリス５０は、このばらつきも考慮した上で塗布厚が設定される。これにより、電池セル１６の下面３８は確実に放熱グリス５０に接触することとなる。 On the other hand, FIG. 6 shows an enlarged cross-sectional view of a main part showing the positional relationship between the battery cell 16 and the bottom wall portion 14A of the storage case 14 in the height direction. As shown in FIG. 6, when the battery cells 16 are viewed from one end in the longitudinal direction of the battery cells 16 in a state where a plurality of battery cells 16 are arranged, they are located at positions in the height direction of the lower surface 38 of the battery cells 16. Has a variation of several μm to several several μm. Therefore, the coating thickness of the thermal paste 50 is set in consideration of this variation. As a result, the lower surface 38 of the battery cell 16 is surely in contact with the thermal paste 50.

さらに、本実施形態では、図１に示されるように、収容ケース１４の底壁部１４Ａには、収容ケース１４の外側にヒートシンク５２が取り付けられている。ヒートシンク５２は、熱伝導性が良いアルミニウム、鉄等の金属によって形成されている。 Further, in the present embodiment, as shown in FIG. 1, a heat sink 52 is attached to the bottom wall portion 14A of the storage case 14 on the outside of the storage case 14. The heat sink 52 is made of a metal such as aluminum or iron having good thermal conductivity.

また、ヒートシンク５２は、収容ケース１４の底壁部１４Ａと面接触する板状の基部５２Ａと、収容ケース１４に固定される固定部５２Ｂと、基部５２Ａから垂下されたフィン部５２Ｃと、を含んで構成されている。 Further, the heat sink 52 includes a plate-shaped base portion 52A that comes into surface contact with the bottom wall portion 14A of the storage case 14, a fixing portion 52B that is fixed to the storage case 14, and a fin portion 52C that hangs down from the base portion 52A. It is composed of.

フィン部５２Ｃは、電池セル１６の配列方向に沿って延在される長板状の複数のフィン５２Ｃ１によって形成されており、フィン５２Ｃ１は、電池セル１６の長手方向に沿って所定のピッチで配置されている。なお、ヒートシンク５２の表面積を増やすため、フィン５２Ｃ１のピッチは、できるだけ小さくなるように設定されている。 The fin portion 52C is formed by a plurality of elongated plate-shaped fins 52C1 extending along the arrangement direction of the battery cells 16, and the fins 52C1 are arranged at a predetermined pitch along the longitudinal direction of the battery cells 16. Has been done. In order to increase the surface area of the heat sink 52, the pitch of the fins 52C1 is set to be as small as possible.

（電池モジュールの作用及び効果）
次に、本発明の実施形態に係る電池モジュール１０の作用及び効果について説明する。 (Battery module action and effect)
Next, the operation and effect of the battery module 10 according to the embodiment of the present invention will be described.

図２、図５に示されるように、本実施形態では、電池スタック１２において、隣り合って配置された電池セル１６間に設けられた樹脂枠１８に開口４０が形成されている。当該開口４０は、樹脂枠１８における側壁部２２、２４の下端から互いに近づく方向へ向かってそれぞれ屈曲して形成された支持部２６の先端２６Ａと支持部２８の先端２８Ａとの間で形成されている。 As shown in FIGS. 2 and 5, in the present embodiment, in the battery stack 12, an opening 40 is formed in a resin frame 18 provided between the battery cells 16 arranged adjacent to each other. The opening 40 is formed between the tip 26A of the support portion 26 and the tip 28A of the support portion 28, which are formed by bending from the lower ends of the side wall portions 22 and 24 of the resin frame 18 toward each other. There is.

このため、電池セル１６の下面３８では、当該開口４０を通じて、電池セル１６の長手方向の両端部３０、３４以外の領域が露出することとなる。本実施形態では、複数の電池セル１６が電池スタック１２の長手方向に沿って配列されている。このため、電池スタック１２の下部１２Ａには、当該開口４０が連続して形成された大開口部４１が形成されている。この大開口部４１を通じて、電池セル１６の下面３８側から当該電池セル１６を冷却することができる。 Therefore, on the lower surface 38 of the battery cell 16, regions other than both ends 30 and 34 in the longitudinal direction of the battery cell 16 are exposed through the opening 40. In this embodiment, a plurality of battery cells 16 are arranged along the longitudinal direction of the battery stack 12. Therefore, a large opening 41 in which the opening 40 is continuously formed is formed in the lower portion 12A of the battery stack 12. Through the large opening 41, the battery cell 16 can be cooled from the lower surface 38 side of the battery cell 16.

すなわち、本実施形態では、防水対策された電池セル１６の下面３８に対して、電池セル１６の長手方向の両端部３０、３４以外の領域を露出させる開口４０が連続して形成された大開口部４１を通じて、当該電池セル１６を冷却することができるため、電池セル１６に対して単純な構造で放熱性能を向上させることが可能となる。 That is, in the present embodiment, a large opening 40 is continuously formed on the lower surface 38 of the battery cell 16 which has been waterproofed to expose areas other than the both ends 30 and 34 in the longitudinal direction of the battery cell 16. Since the battery cell 16 can be cooled through the unit 41, it is possible to improve the heat dissipation performance with a simple structure with respect to the battery cell 16.

ここで、本実施形態では、図１に示されるように、収容ケース１４の底壁部１４Ａには、放熱グリス５０が塗布されており、電池スタック１２は、放熱グリス５０を介して、収容ケース１４の底壁部１４Ａに載置されている。そして、収容ケース１４の底壁部１４Ａには、収容ケース１４の外側にヒートシンク５２が設けられている。 Here, in the present embodiment, as shown in FIG. 1, the bottom wall portion 14A of the storage case 14 is coated with the thermal paste 50, and the battery stack 12 is the storage case via the heat radiation grease 50. It is mounted on the bottom wall portion 14A of 14. A heat sink 52 is provided on the bottom wall portion 14A of the storage case 14 on the outside of the storage case 14.

具体的に説明すると、本実施形態では、電池セル１６の下面３８は、収容ケース１４の底壁部１４Ａに塗布された放熱グリス５０と接触し、当該収容ケース１４の底壁部１４Ａには、ヒートシンク５２の基部５２Ａが面接触している。 Specifically, in the present embodiment, the lower surface 38 of the battery cell 16 comes into contact with the thermal paste 50 applied to the bottom wall portion 14A of the storage case 14, and the bottom wall portion 14A of the storage case 14 is contacted. The base 52A of the heat sink 52 is in surface contact.

したがって、本実施形態では、電池セル１６の熱は、当該電池セル１６の下面３８を介して、放熱グリス５０、収容ケース１４の底壁部１４Ａ、ヒートシンク５２の基部５２Ａの順に伝達される。つまり、本実施形態では、電池セル１６、放熱グリス５０、収容ケース１４及びヒートシンク５２の間で伝熱経路が確保され、ヒートシンク５２のフィン部５２Ｃを介して、電池セル１６から発する熱を放熱させることが可能となる。 Therefore, in the present embodiment, the heat of the battery cell 16 is transferred in the order of the thermal paste 50, the bottom wall portion 14A of the storage case 14, and the base portion 52A of the heat sink 52 via the lower surface 38 of the battery cell 16. That is, in the present embodiment, a heat transfer path is secured between the battery cell 16, the thermal paste 50, the accommodating case 14, and the heat sink 52, and the heat generated from the battery cell 16 is dissipated through the fin portion 52C of the heat sink 52. It becomes possible.

また、本実施形態では、前述のように、電池セル１６の下面３８と収容ケース１４の底壁部１４Ａとの間に放熱グリス５０が設けられており、この放熱グリス５０を介して、電池セル１６の熱が収容ケース１４の底壁部１４Ａ側へ伝達されるように設定されている。 Further, in the present embodiment, as described above, the thermal paste 50 is provided between the lower surface 38 of the battery cell 16 and the bottom wall portion 14A of the storage case 14, and the battery cell is provided through the thermal paste 50. The heat of 16 is set to be transferred to the bottom wall portion 14A side of the storage case 14.

ここで、図６に示されるように、本実施形態では、複数の電池セル１６が配列された状態で、電池セル１６の下面３８の高さ方向の位置において、数μm〜１０数μmのばらつきが生じるため、放熱グリス５０の塗布厚は、このばらつきも考慮した上で予め設定されている。これにより、本実施形態では、電池セル１６の下面３８が確実に放熱グリス５０に接触するように設定されている。 Here, as shown in FIG. 6, in the present embodiment, in a state where a plurality of battery cells 16 are arranged, the variation of several μm to several several μm at the position in the height direction of the lower surface 38 of the battery cells 16. Therefore, the coating thickness of the thermal paste 50 is set in advance in consideration of this variation. As a result, in the present embodiment, the lower surface 38 of the battery cell 16 is set to surely come into contact with the thermal paste 50.

さらに、図１に示されるように、ヒートシンク５２の基部５２Ａは、収容ケース１４の底壁部１４Ａの外側に面接触している。すなわち、本実施形態では、電池セル１６、放熱グリス５０及びヒートシンク５２の間で隙間が生じないようにしている。これにより、本実施形態では、冷却損失を抑制し、電池セル１６を効果的に冷却できるようにしている。 Further, as shown in FIG. 1, the base portion 52A of the heat sink 52 is in surface contact with the outside of the bottom wall portion 14A of the storage case 14. That is, in the present embodiment, no gap is formed between the battery cell 16, the thermal paste 50, and the heat sink 52. Thereby, in this embodiment, the cooling loss is suppressed and the battery cell 16 can be effectively cooled.

一方、本実施形態では、図５に示されるように、樹脂枠１８は、支持部２６、２８によって電池セル１６の長手方向の両端部３０、３４をそれぞれ支持している。一般に、支持部２６、２８において、電池セル１６との掛かり代を増やすことによって、電池セル１６を支持する支持力は向上する。 On the other hand, in the present embodiment, as shown in FIG. 5, the resin frame 18 supports both ends 30 and 34 of the battery cell 16 in the longitudinal direction by the support portions 26 and 28, respectively. Generally, in the support portions 26 and 28, the support force for supporting the battery cell 16 is improved by increasing the hooking allowance with the battery cell 16.

その一方で、当該支持部２６、２８において、電池セル１６との掛かり代を増やすと、電池セル１６の下面３８を露出させる開口４０の面積は小さくなり、その結果、電池セル１６の冷却性能は低下する可能性がある。 On the other hand, if the hooking allowance with the battery cell 16 is increased in the support portions 26 and 28, the area of the opening 40 that exposes the lower surface 38 of the battery cell 16 becomes smaller, and as a result, the cooling performance of the battery cell 16 becomes smaller. May decrease.

したがって、本実施形態では、樹脂枠１８の側壁部２２にリップ部４２を設け、電池セル１６を側壁部２４側へ付勢して、当該電池セル１６の長手方向の他端部３４を側壁部２４の基準面４４に当接させている。これにより、樹脂枠１８の側壁部２２に設けられた反基準面４６と電池セル１６の長手方向の一端部３０との間には、隙間５４（図８（Ｃ）参照）が形成される。 Therefore, in the present embodiment, the lip portion 42 is provided on the side wall portion 22 of the resin frame 18, the battery cell 16 is urged toward the side wall portion 24, and the other end portion 34 in the longitudinal direction of the battery cell 16 is the side wall portion. It is in contact with the reference surface 44 of 24. As a result, a gap 54 (see FIG. 8C) is formed between the anti-reference surface 46 provided on the side wall portion 22 of the resin frame 18 and the one end portion 30 in the longitudinal direction of the battery cell 16.

ここで、比較例として、図８（Ａ）に示されるように、一対の支持部２６、２８において、電池セル１６との掛かり代を考えた場合、支持部２６（反基準面４６側）側では、電池セル１６との掛かり代は、支持部２８（基準面４４側）側よりも小さくなる。 Here, as a comparative example, as shown in FIG. 8A, when considering the hooking allowance with the battery cell 16 in the pair of support portions 26 and 28, the support portion 26 (anti-reference surface 46 side) side. Then, the hooking allowance with the battery cell 16 is smaller than that on the support portion 28 (reference surface 44 side) side.

このように、樹脂枠１８の支持部２６と電池セル１６との間で掛かり代が小さい場合、電池セル１６に対して、支持部２６による支持力が十分ではなく、電池セル１６が当該支持部２６からずれる可能性がある。したがって、電池セル１６の下面３８の精度は悪くなる。 As described above, when the hooking allowance between the support portion 26 of the resin frame 18 and the battery cell 16 is small, the support force of the support portion 26 is not sufficient with respect to the battery cell 16, and the battery cell 16 is the support portion. There is a possibility of deviation from 26. Therefore, the accuracy of the lower surface 38 of the battery cell 16 deteriorates.

一方、比較例として、図８（Ｂ）に示されるように、支持部２６、２８において、電池セル１６との掛かり代を増やした場合について検討する。この場合、電池セル１６を支持する支持力は向上するが、電池セル１６の下面３８を露出させる開口４０の面積は、その分小さくなる。その結果、電池セル１６の冷却性能は低下する可能性がある。 On the other hand, as a comparative example, as shown in FIG. 8B, a case where the support portions 26 and 28 have an increased hooking allowance with the battery cell 16 will be examined. In this case, the bearing capacity for supporting the battery cell 16 is improved, but the area of the opening 40 that exposes the lower surface 38 of the battery cell 16 is reduced by that amount. As a result, the cooling performance of the battery cell 16 may deteriorate.

このため、本実施形態では、一対の支持部２６、２８のうち、側壁部２２側に形成された支持部２６の長さＬ１は、側壁部２４側に形成された支持部２８の長さＬ２（＜Ｌ１）よりも長くなるように設定されている。 Therefore, in the present embodiment, of the pair of support portions 26 and 28, the length L1 of the support portion 26 formed on the side wall portion 22 side is the length L2 of the support portion 28 formed on the side wall portion 24 side. It is set to be longer than (<L1).

これにより、本実施形態では、図８（Ｃ）に示されるように、電池セル１６との間で掛かり代が小さくなる支持部２６側において、掛かり代を確保することが可能となる。その結果、電池セル１６との間で掛かり代が小さくなる支持部２６側における支持力が担保され、電池セル１６の下面３８の精度を向上させることが可能となる。 Thereby, in the present embodiment, as shown in FIG. 8C, it is possible to secure the hooking allowance on the support portion 26 side where the hooking allowance is small with the battery cell 16. As a result, the bearing capacity on the side of the support portion 26, which reduces the hooking allowance with the battery cell 16, is secured, and the accuracy of the lower surface 38 of the battery cell 16 can be improved.

また、本実施形態では、支持部２６（反基準面４６側）において、電池セル１６との掛かり代を確保するため、支持部２６のみ長さＬ１を長くしている。これにより、支持部２６の先端２６Ａと支持部２８の先端２８Ａとの離間距離Ｌ３が狭くなることを抑制し、開口面積を維持することが可能となる。 Further, in the present embodiment, in the support portion 26 (on the side of the anti-reference surface 46), the length L1 of only the support portion 26 is lengthened in order to secure a hooking allowance with the battery cell 16. As a result, it is possible to prevent the distance L3 between the tip 26A of the support portion 26 and the tip 28A of the support portion 28 from becoming narrow, and to maintain the opening area.

したがって、本実施形態では、樹脂枠１８において、電池セル１６との掛かり代を確保すると共に、電池セル１６の下面３８の露出面積を維持し、電池セル１６の冷却効率の低下を抑制することが可能となる。 Therefore, in the present embodiment, in the resin frame 18, it is possible to secure a hooking allowance with the battery cell 16 and maintain the exposed area of the lower surface 38 of the battery cell 16 to suppress a decrease in the cooling efficiency of the battery cell 16. It will be possible.

なお、本実施形態では、支持部２６の長さＬ１が支持部２８の長さＬ２よりも長くなるように設定することによって、支持部２６側において、電池セル１６との間の掛かり代を確保するようにしているが、電池セル１６が支持部２６からずれないようにすることができればよいため、これに限るものではない。 In the present embodiment, by setting the length L1 of the support portion 26 to be longer than the length L2 of the support portion 28, a hooking allowance with the battery cell 16 is secured on the support portion 26 side. However, the present invention is not limited to this, as long as the battery cell 16 can be prevented from deviating from the support portion 26.

例えば、支持部２６側において、表面粗さを粗くする等、表面摩擦係数を高くして、電池セル１６が支持部２６からずれ難くするようにしてもよい。 For example, on the support portion 26 side, the surface friction coefficient may be increased by roughening the surface roughness to prevent the battery cell 16 from being displaced from the support portion 26.

また、本実施形態では、樹脂枠１８において、支持部２６、２８は、本体部２０と連設されて側壁部２２、２４の下端からそれぞれ延出されているが、電池セル１６の長手方向の両端部３０、３４を支持することができればよい。このため、支持部２６、２８は、必要な剛性を担保することができれば、必ずしも本体部２０と連設される必要はない。つまり、支持部２６、２８の幅寸法は、電池セル１６の幅方向と略同じ寸法である必要はない。 Further, in the present embodiment, in the resin frame 18, the support portions 26 and 28 are connected to the main body portion 20 and extend from the lower ends of the side wall portions 22 and 24, respectively, but in the longitudinal direction of the battery cell 16. It suffices if both ends 30 and 34 can be supported. Therefore, the support portions 26 and 28 do not necessarily have to be connected to the main body portion 20 as long as the required rigidity can be ensured. That is, the width dimension of the support portions 26 and 28 does not have to be substantially the same as the width dimension of the battery cell 16.

以上、本発明の実施形態の一例について説明したが、本発明は、その要旨を逸脱しない範囲で種々変更して実施できる。また、本発明の権利範囲が上記実施形態に限定されないことは勿論のことである。 Although an example of the embodiment of the present invention has been described above, the present invention can be implemented with various modifications without departing from the gist thereof. Further, it goes without saying that the scope of rights of the present invention is not limited to the above-described embodiment.

１０ 電池モジュール
１２ 電池スタック
１４ 収容ケース
１６ 電池セル
１８ 樹脂枠
２０ 本体部（樹脂枠）
２２ 側壁部（一方の側壁部、樹脂枠）
２４ 側壁部（他方の側壁部、樹脂枠）
２６ 支持部（一方の支持部、樹脂枠）
２８ 支持部（他方の支持部、樹脂枠）
３０ 一端部（電池セルの長手方向の他端部）
３４ 他端部（電池セルの長手方向の一端部）
３８ 下面（電池セルの下面）
４０ 開口
４１ 大開口部（開口）
４２ リップ部（付勢部）
４４ 基準面
４６ 反基準面
５２ ヒートシンク 10 Battery module 12 Battery stack 14 Storage case 16 Battery cell 18 Resin frame 20 Main body (resin frame)
22 Side wall (one side wall, resin frame)
24 Side wall (the other side wall, resin frame)
26 Support part (one support part, resin frame)
28 Support part (the other support part, resin frame)
30 One end (the other end of the battery cell in the longitudinal direction)
34 The other end (one end in the longitudinal direction of the battery cell)
38 Bottom surface (bottom surface of battery cell)
40 Aperture 41 Large Aperture (Aperture)
42 Lip part (Attendant part)
44 Reference plane 46 Anti-reference plane 52 Heat sink

Claims (4)

防水対策が施され、水平方向に沿って配列され、配列方向に対して直交する方向を長手方向とする複数の電池セルと、
隣り合って配置された前記電池セル間にそれぞれ設けられると共に、当該電池セルの長手方向の両端部を支持して、前記電池セルの下面を露出させる開口を形成する複数の樹脂枠と、
を含んで構成された電池スタック。 A plurality of battery cells that are waterproof, arranged along the horizontal direction, and whose longitudinal direction is orthogonal to the arrangement direction,
A plurality of resin frames provided between the battery cells arranged adjacent to each other and supporting both ends in the longitudinal direction of the battery cells to form an opening for exposing the lower surface of the battery cells.
A battery stack configured to include. 前記樹脂枠は、
隣り合って配置された前記電池セル間に配置される矩形板状の本体部と、
前記本体部の長手方向の両端に設けられ、前記電池セルの長手方向の両端が当接可能な一対の側壁部と、
前記側壁部の下端から水平方向に沿って屈曲され、前記電池セルの長手方向の両端部の下面に当接して当該電池セルを支持可能な一対の支持部と、
を含んで構成されている請求項１に記載の電池スタック。 The resin frame is
A rectangular plate-shaped main body arranged between the battery cells arranged adjacent to each other,
A pair of side wall portions provided at both ends in the longitudinal direction of the main body and capable of contacting both ends in the longitudinal direction of the battery cell.
A pair of support portions that are bent from the lower end of the side wall portion in the horizontal direction and can abut on the lower surfaces of both end portions in the longitudinal direction of the battery cell to support the battery cell.
The battery stack according to claim 1, further comprising. 前記一対の側壁部のうち一方の側壁部に設けられ、前記電池セルを当該一対の側壁部のうち他方の側壁部側へ向かって付勢する付勢部が形成された反基準面と、
前記他方の側壁部に設けられ、前記電池セルの長手方向の一端部が当接する基準面と、
を備え、
前記一対の支持部のうち前記一方の側壁部側に形成された一方の支持部の長さは、前記他方の側壁部側に形成された他方の支持部の長さよりも長くなるように設定されている請求項２に記載の電池スタック。 An anti-reference surface provided on one side wall portion of the pair of side wall portions and formed with an urging portion for urging the battery cell toward the other side wall portion side of the pair of side wall portions.
A reference surface provided on the other side wall portion and in contact with one end portion in the longitudinal direction of the battery cell,
With
The length of one support portion formed on the one side wall portion side of the pair of support portions is set to be longer than the length of the other support portion formed on the other side wall portion side. The battery stack according to claim 2. 請求項１〜請求項３の何れか１項に記載の電池スタックと、
防水対策が施された状態で前記電池スタックが収容されると共に、前記電池セルの下面を通じて当該電池セルから発する熱を放熱するヒートシンクが設けられた収容ケースと、
を備えた電池モジュール。 The battery stack according to any one of claims 1 to 3.
A storage case in which the battery stack is housed in a waterproof state and a heat sink is provided to dissipate heat generated from the battery cell through the lower surface of the battery cell.
Battery module with.
JP2019224461A 2019-12-12 2019-12-12 Battery stack and battery module using this battery stack Active JP7351204B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2019224461A JP7351204B2 (en) 2019-12-12 2019-12-12 Battery stack and battery module using this battery stack
US17/085,455 US20210184189A1 (en) 2019-12-12 2020-10-30 Battery stack and battery module employing battery stack
CN202011266200.3A CN112993456B (en) 2019-12-12 2020-11-13 Battery pack and battery module using same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019224461A JP7351204B2 (en) 2019-12-12 2019-12-12 Battery stack and battery module using this battery stack

Publications (2)

Publication Number Publication Date
JP2021093331A true JP2021093331A (en) 2021-06-17
JP7351204B2 JP7351204B2 (en) 2023-09-27

Family

ID=76312816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019224461A Active JP7351204B2 (en) 2019-12-12 2019-12-12 Battery stack and battery module using this battery stack

Country Status (3)

Country Link
US (1) US20210184189A1 (en)
JP (1) JP7351204B2 (en)
CN (1) CN112993456B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012243619A (en) * 2011-05-20 2012-12-10 Kobelco Contstruction Machinery Ltd Capacitor
JP2013242967A (en) * 2012-05-17 2013-12-05 Denso Corp Battery pack

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140023906A1 (en) * 2011-03-31 2014-01-23 Hiroyuki Hashimoto Power supply apparatus and vehicle having the same
JP2012248339A (en) * 2011-05-25 2012-12-13 Sanyo Electric Co Ltd Power unit for electric power and vehicle with power unit
KR101282519B1 (en) * 2011-08-02 2013-07-04 로베르트 보쉬 게엠베하 Battery module
JP6287384B2 (en) * 2013-04-08 2018-03-07 株式会社Ｇｓユアサ Power storage device
JP6769175B2 (en) 2016-08-26 2020-10-14 トヨタ自動車株式会社 Battery unit
CN206004600U (en) * 2016-09-21 2017-03-08 江苏中宇光伏科技有限公司 A kind of waterproof solar battery component
CN106981618B (en) * 2017-01-21 2019-08-06 浙江超威创元实业有限公司 A kind of passive waterproof system of lithium battery and production, waterproof method and electric vehicle
JP6922683B2 (en) * 2017-11-17 2021-08-18 トヨタ自動車株式会社 Battery pack, battery pack manufacturing method and intervening members
JP7151493B2 (en) * 2019-01-15 2022-10-12 トヨタ自動車株式会社 battery device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012243619A (en) * 2011-05-20 2012-12-10 Kobelco Contstruction Machinery Ltd Capacitor
JP2013242967A (en) * 2012-05-17 2013-12-05 Denso Corp Battery pack

Also Published As

Publication number Publication date
US20210184189A1 (en) 2021-06-17
CN112993456B (en) 2023-07-04
CN112993456A (en) 2021-06-18
JP7351204B2 (en) 2023-09-27

Similar Documents

Publication Publication Date Title
JP6608653B2 (en) Battery module
CN109478619B (en) Battery module
CN109565005B (en) Battery module
JP7074486B2 (en) Secondary battery module
US10333186B2 (en) Electricity storage pack
JP5991527B2 (en) Battery and power storage device
CN109643833B (en) Battery module
JP2017103158A (en) Battery pack
WO2014068946A1 (en) Battery module
JP2015125930A (en) Battery pack module
JPWO2020065709A1 (en) Battery module
JP2019012652A (en) Battery module and battery pack
US20180069214A1 (en) Electricity storage pack
JP2023027342A (en) Power conversion device
KR20210011640A (en) Battery module
JP7413872B2 (en) electrical junction box
JP7259721B2 (en) battery module
JPWO2019123930A1 (en) Battery module
JP2021093331A (en) Battery stack and battery module using the battery stack
JP5699868B2 (en) battery
CN107949952B (en) Battery pack
KR20170124304A (en) Battery module
KR20210063245A (en) Battery module
JP2021082512A (en) Battery module
JP7322598B2 (en) Battery cooling structure

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20211224

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20230307

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20230426

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20230815

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20230828

R151 Written notification of patent or utility model registration

Ref document number: 7351204

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151